US6299348B1 - Immersion measuring probe for measurement in liquids - Google Patents

Immersion measuring probe for measurement in liquids Download PDF

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Publication number
US6299348B1
US6299348B1 US09/427,959 US42795999A US6299348B1 US 6299348 B1 US6299348 B1 US 6299348B1 US 42795999 A US42795999 A US 42795999A US 6299348 B1 US6299348 B1 US 6299348B1
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Prior art keywords
measuring
carrier tube
signal lines
immersion
probe according
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Expired - Lifetime
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US09/427,959
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English (en)
Inventor
Alfons Theuwis
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Heraeus Electro Nite International NV
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Heraeus Electro Nite International NV
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Assigned to HERAEUS ELECTRO-NITE INTERNATIONAL N.V. reassignment HERAEUS ELECTRO-NITE INTERNATIONAL N.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: THEUWIS, ALFONS
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/025—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples expendable thermocouples

Definitions

  • the invention relates to an immersion measuring probe for measurement in liquids, in particular in molten metals, the probe having a carrier tube, a measuring head mounted on one end of the carrier tube, and measuring elements as well as signal lines for the measuring signals generated by the measuring elements arranged on the measuring head, wherein the signal lines are longer than the carrier tube and run from the end of the measuring head facing the inside of the carrier tube, and wherein the signal lines run through the inside of the carrier tube and are wound up inside of the carrier tube around its longitudinal axis.
  • Measuring probes of this type are known from U.S. Pat. No. 3,505,871. They are used for measuring in steel-converter furnaces (converters). For measurements in converters the measuring probe is dropped into the converter from a relatively large height. The signal lines are wound up on the inner surface of the carrier tube, and they automatically unwind themselves during the free fall of the measuring probes, wherein one end of the signal line is connected to the measuring head, while the other end of the signal line is either connected via a contact piece by extension lines or compensation lines or directly to a measuring and evaluation device. In this manner, several measuring probes can be stored in a magazine at a great height above the converter, wherein for the measurements one measuring probe at a time is released from the magazine and falls in free fall into the molten metal located in the converter.
  • the measuring probe disclosed therein has a sample chamber arranged outside of the measuring head, which is mounted on a steel cable guided through a tube parallel to the carrier tube.
  • the steel cable is wound up on a spool and can be unwound when the measuring head is lowered.
  • an object of the present invention is to create an improved measuring probe, which can be handled very simply and safely, and whose handling can be automated easily.
  • the signal lines are wound in multiple layers against the inside wall of the carrier tube and that in the longitudinal direction of the carrier tube, directly in front of the winding of the signal lines, a fixing stopper with at least one passage for the signal lines is arranged to rest against the windings.
  • Very long signal lines can thereby be housed in a very space-saving manner in a small space, so that an impairment of or damage to the windings is nearly ruled out, due to the protected position inside the carrier tube, so that a safe handling is ensured.
  • Due to the stable outer surface, a plurality of measuring probes of this type can be arranged in stacked magazines in a space-saving manner. A suspended arrangement, wherein each one is spaced from the other, is not necessary.
  • the signal line unwinds itself from and out of the carrier tube due to its connection to a measurement or evaluation device.
  • expensive precautions to prevent rolling motions of the measuring head or the carrier tube on the way to the bottom are superfluous. A stable and space-saving mounting of the windings is thereby achieved.
  • the signal lines are arranged in a signal cable, wherein a plurality of different signal lines are combined into a single strand.
  • the signal lines can be connected by a contact piece at the end of the carrier tube facing away from the measuring head and/or can be constructed to run through this end of the carrier tube.
  • fixing stoppers are arranged in the longitudinal direction of the carrier tube directly in front of and behind the winding of the signal lines and lying against the windings, with respectively at least one passage for the signal lines.
  • the passages in the fixing stoppers make possible a free sliding through of the signal lines when the windings are unwound in free fall.
  • the fixing stoppers can be arranged at different positions within the carrier tube.
  • the measuring head is releasably mounted in the carrier tube, preferably with catch elements, so that after its release from the carrier tube the measuring head pulls the signal line behind it out of the carrier tube.
  • the catch elements release the measuring head upon a force of approximately 300N to 600N directed in the axial direction of the carrier tube.
  • the catch elements of the measuring head engage on catch elements of a fixing stopper.
  • the measuring head can have at least one thermocouple and/or at least one electrochemical measuring element, especially for measuring oxygen, so that combined measurements of several parameters are possible.
  • the measuring head preferably has a density greater than or equal to the pre-determined density of the liquid to be measured.
  • the signal lines are generally approximately 10-50 times, in many cases especially 25-45 times, as long as the length of the measuring probe.
  • the measuring head has a protective cap, which encloses at least the measuring elements, and which is formed from a material that dissolves or melts in the liquid.
  • FIG. 1 shows an immersion measuring probe according to the invention with a sectioned carrier tube
  • FIG. 2 shows a section through the front part of the immersion measuring probe according to FIG. 1 .
  • the immersion measuring probe has a carrier tube 1 , which can be formed from cardboard, for example. Inside the carrier tube 1 , starting from one end, a signal cable 2 is wound up, such that the outer layer of the winding lies against the inside surface of the carrier tube 1 . In the signal cable 2 the signal lines not depicted individually in the drawing are combined. The signal lines arranged in the signal cable 2 are attached together with this at its one end to a measuring head 3 .
  • the measuring head 3 is mounted in one end of the carrier tube It is held there in a fixing stopper 5 by first catch elements 4 of the measuring head 3 and second catch elements 4 ′ of the fixing stopper 5 .
  • the fixing stopper 5 in turn is affixed in the carrier tube 1 .
  • the winding of the signal cable 2 follows in the desired length, for example approximately 20-30 m.
  • a second fixing stopper 6 is arranged, which together with the first fixing stopper 5 ensures that the windings are not damaged prior to the use of the immersion measuring probe according to specifications.
  • the position of the second fixing stopper 6 within the carrier tube 1 is a function of the length of the signal cable 2 .
  • FIG. 1 the position of the second fixing stopper 6 is depicted schematically for several different signal cable lengths. The windings are wound starting from the second fixing stopper 6 along the inner wall of the carrier tube 1 in the direction of the carrier tube front end, toward the measuring head 3 .
  • a second winding is guided in the opposite direction to the second fixing stopper 6 , and proceeding from there, a third winding is guided as an inner winding up to the first fixing stopper 5 arranged on the measuring head 3 .
  • the signal cable 2 is connected to the contact points 7 of the measuring element inside the measuring head 3 .
  • This connection portion runs in the longitudinal axis of the carrier tube 1 through a corresponding axial opening 8 in the measuring head 3 .
  • the signal cable 2 is guided through an opening, adjacent to the inner wall of the carrier tube 1 , of the second fixing stopper 6 , in the direction of the second end of the carrier tube 1 .
  • This second end of the carrier tube 1 is closed by a stopper 9 , in which a contact piece 10 is arranged.
  • the contact piece 10 functions for the contact, not shown, of the signal lines arranged in the signal cable 2 with an extension cable or compensation cable to a measurement value display and evaluation unit.
  • the measuring head 3 carries an outer protective cap 11 for mechanical protection of the measuring elements, among other things upon impact of the measuring head 3 on the surface of the molten metal to be measured.
  • the protective cap 11 can likewise be constructed of steel.
  • an additional protective cap 12 is arranged directly around the measuring elements, and this cap also dissolves after passage of the measuring head 3 through a possible slag layer and opens the measuring elements, not shown in the drawing, to the action of the melt.
  • the measuring elements themselves are constructed as conventional measuring elements well-known to the artisan, for example thermocouples or solid electrolyte oxygen measuring cells.
  • the immersion measuring probe In operation, the immersion measuring probe is released from a magazine, for example a stacked magazine. It falls downwardly in free fall, whereby the signal cable 2 unwinds from the winding.
  • the carrier tube By the attachment of the rear end of the immersion measuring probe to a measurement value display and evaluation device via the contact piece 10 and the stopper 9 , the carrier tube can only fall a limited distance. The distance of the fall is a function of the length of the connection line to the measuring display and evaluation device.
  • Upon reaching this maximum fall distance of the carrier tube 1 its movement suddenly stops, and a force acts on the measuring head 3 , which pops it out of the first fixing stopper 5 , so that it continues the falling movement, whereby it pulls the signal cable 2 behind it out of the winding.
  • the measuring head 3 is relatively compact and is constructed of solid steel up to the opening for receiving the signal cable 2 or the measuring elements and their connection to the signal cable 2 . It therefore plunges deep into the molten mass upon impacting the melt surface, so that after the immersion of the measuring head 3 into the melt, measurements can be taken.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
US09/427,959 1998-10-27 1999-10-27 Immersion measuring probe for measurement in liquids Expired - Lifetime US6299348B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19849433 1998-10-27
DE19849433A DE19849433C1 (de) 1998-10-27 1998-10-27 Eintauch-Meßsonde zur Messung in Flüssigkeiten

Publications (1)

Publication Number Publication Date
US6299348B1 true US6299348B1 (en) 2001-10-09

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ID=7885758

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US09/427,959 Expired - Lifetime US6299348B1 (en) 1998-10-27 1999-10-27 Immersion measuring probe for measurement in liquids

Country Status (16)

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US (1) US6299348B1 (es)
EP (1) EP0997716B1 (es)
JP (1) JP3527152B2 (es)
KR (1) KR100583032B1 (es)
CN (1) CN1155812C (es)
AU (1) AU756510B2 (es)
BR (1) BR9905593B1 (es)
CA (1) CA2288504C (es)
DE (2) DE19849433C1 (es)
ES (1) ES2279594T3 (es)
PL (1) PL193677B1 (es)
RU (1) RU2201969C2 (es)
TR (1) TR199902675A2 (es)
TW (1) TW424141B (es)
UA (1) UA56227C2 (es)
ZA (1) ZA996723B (es)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050123022A1 (en) * 2002-10-18 2005-06-09 Mesure Technology Co., Ltd. Temperature probe and thermometer having the same
US20060237311A1 (en) * 2005-04-26 2006-10-26 Heraeus Electro-Nite International N.V. Immersion measuring probe
US20060236750A1 (en) * 2005-04-26 2006-10-26 Heraeus Electro-Nite International N.V. Immersion measuring probe, particularly a drop-in-measuring probe
US20070137324A1 (en) * 2005-12-15 2007-06-21 Heraeus Electro-Nite International N.V. Measuring probe for measurments in metal or slag melts
US20080088047A1 (en) * 2006-10-12 2008-04-17 Mold-Masters Limited Apparatus and method for a hot runner injection molding system
US20090110026A1 (en) * 2007-10-24 2009-04-30 Heraeus Electro-Nite Co. Expendable immersion device
US20120082183A1 (en) * 2009-06-05 2012-04-05 Heraeus Electro-Nite International N.V. Drop-in probe
RU2507488C1 (ru) * 2012-09-24 2014-02-20 Открытое Акционерное Общество "Ордена Ленина Научно-Исследовательский И Конструкторский Институт Энерготехники Имени Н.А. Доллежаля" Устройство для измерения температуры
US20160209342A1 (en) * 2015-01-21 2016-07-21 Heraeus Electro-Nite International N.V. Reverse filling carbon and temperature drop-in sensor
US20180036929A1 (en) * 2016-08-03 2018-02-08 Procon Training and Consulting, LLC Melt temperature measurement system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005040311B3 (de) * 2005-08-24 2006-10-26 Heraeus Electro-Nite International N.V. Vorrichtung zur Temperaturmessung in Metallschmelzen
EP1887348B1 (de) * 2006-06-23 2012-12-19 Mettler-Toledo AG Tauchrohr für eine Messsonde
CN106246174B (zh) * 2016-08-12 2019-06-11 中国石油天然气集团公司 一种基于电磁波的柱状持水率检测探头

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095106A (en) 1965-04-06 1967-12-13 Leeds & Northrup Co Expendable immersion thermocouple assembly
US3505871A (en) 1968-03-21 1970-04-14 Bethlehem Steel Corp Apparatus for determining the temperature of a molten ferrous bath in a basic oxygen furnace
US3716417A (en) * 1970-12-24 1973-02-13 Pyco Inc Profile thermocouple
GB2176611A (en) 1985-06-20 1986-12-31 Thor Ceramics Ltd Continuous temperature measurement in molten metal
EP0375109A2 (en) 1988-12-23 1990-06-27 MIDWEST INSTRUMENT CO., INC. (a Wisconsin corporation) Immersible probe
US5043560A (en) * 1989-09-29 1991-08-27 Masreliez C Johan Temperature control of a heated probe
US5168764A (en) 1990-07-23 1992-12-08 Falk Richard A Method and apparatus for taking metal samples
US5584578A (en) 1995-02-24 1996-12-17 Heraeus Electro-Nite International N.V. Drop-in immersion probe
US5999081A (en) * 1996-11-29 1999-12-07 Marchi Associates, Inc. Shielding unique for filtering RFI and EFI interference signals from the measuring elements

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095106A (en) 1965-04-06 1967-12-13 Leeds & Northrup Co Expendable immersion thermocouple assembly
US3505871A (en) 1968-03-21 1970-04-14 Bethlehem Steel Corp Apparatus for determining the temperature of a molten ferrous bath in a basic oxygen furnace
US3716417A (en) * 1970-12-24 1973-02-13 Pyco Inc Profile thermocouple
GB2176611A (en) 1985-06-20 1986-12-31 Thor Ceramics Ltd Continuous temperature measurement in molten metal
EP0375109A2 (en) 1988-12-23 1990-06-27 MIDWEST INSTRUMENT CO., INC. (a Wisconsin corporation) Immersible probe
US5043560A (en) * 1989-09-29 1991-08-27 Masreliez C Johan Temperature control of a heated probe
US5168764A (en) 1990-07-23 1992-12-08 Falk Richard A Method and apparatus for taking metal samples
US5584578A (en) 1995-02-24 1996-12-17 Heraeus Electro-Nite International N.V. Drop-in immersion probe
US5999081A (en) * 1996-11-29 1999-12-07 Marchi Associates, Inc. Shielding unique for filtering RFI and EFI interference signals from the measuring elements

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Drawing of Midwest Instrument Company, Inc. of "Internal Wound Bomb Layout", dated Jul. 18, 2000, allegedly depicting design of Minco bomb sold to LTV Steel on Jan. 24, 1997.
Drawing of Minkon Sampler Technik GmbH dated Dec. 18, 1997 of MINCO-Wurfsonde Type: BTT-18-75-26 (Article No. 132/0100), allegedly publicly used in Germany prior to Oct. 27, 1998.
E. Halvachs, et al., Improvement of Turndown Performance Using Bomb Thermocouples at Granite City'BOF Shop, Iron & Steelmaker, Sep. 1993.

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050123022A1 (en) * 2002-10-18 2005-06-09 Mesure Technology Co., Ltd. Temperature probe and thermometer having the same
US20060237311A1 (en) * 2005-04-26 2006-10-26 Heraeus Electro-Nite International N.V. Immersion measuring probe
US20060236750A1 (en) * 2005-04-26 2006-10-26 Heraeus Electro-Nite International N.V. Immersion measuring probe, particularly a drop-in-measuring probe
US7449141B2 (en) * 2005-04-26 2008-11-11 Heraeus Electro-Nite International N.V. Immersion measuring probe, particularly a drop-in-measuring probe
US20070137324A1 (en) * 2005-12-15 2007-06-21 Heraeus Electro-Nite International N.V. Measuring probe for measurments in metal or slag melts
US7832294B2 (en) 2005-12-15 2010-11-16 Heraeus Electro-Nite International, N.V. Measuring probe for measurements in metal or slag melts
US20080088047A1 (en) * 2006-10-12 2008-04-17 Mold-Masters Limited Apparatus and method for a hot runner injection molding system
US20090110026A1 (en) * 2007-10-24 2009-04-30 Heraeus Electro-Nite Co. Expendable immersion device
US20120082183A1 (en) * 2009-06-05 2012-04-05 Heraeus Electro-Nite International N.V. Drop-in probe
US9116054B2 (en) * 2009-06-05 2015-08-25 Heraeus Electro-Nite International N.V. Drop-in probe
RU2507488C1 (ru) * 2012-09-24 2014-02-20 Открытое Акционерное Общество "Ордена Ленина Научно-Исследовательский И Конструкторский Институт Энерготехники Имени Н.А. Доллежаля" Устройство для измерения температуры
US20160209342A1 (en) * 2015-01-21 2016-07-21 Heraeus Electro-Nite International N.V. Reverse filling carbon and temperature drop-in sensor
US9958405B2 (en) * 2015-01-21 2018-05-01 Heraeus Electro-Nite International N.V. Reverse filling carbon and temperature drop-in sensor
US20180036929A1 (en) * 2016-08-03 2018-02-08 Procon Training and Consulting, LLC Melt temperature measurement system
US10065351B2 (en) * 2016-08-03 2018-09-04 Procon Training and Consulting, LLC Melt temperature measurement system
US10875229B2 (en) 2016-08-03 2020-12-29 Procon Training and Consulting, LLC Melt temperature measurement system

Also Published As

Publication number Publication date
TR199902675A3 (tr) 2000-07-21
AU756510B2 (en) 2003-01-16
EP0997716B1 (de) 2007-01-10
DE59914141D1 (de) 2007-02-22
BR9905593A (pt) 2000-09-26
KR20000029270A (ko) 2000-05-25
AU5609799A (en) 2000-05-04
CA2288504C (en) 2007-07-03
BR9905593B1 (pt) 2011-04-19
PL193677B1 (pl) 2007-03-30
TW424141B (en) 2001-03-01
UA56227C2 (uk) 2003-05-15
CA2288504A1 (en) 2000-04-27
KR100583032B1 (ko) 2006-05-24
ES2279594T3 (es) 2007-08-16
DE19849433C1 (de) 2000-04-20
ZA996723B (en) 2000-05-16
EP0997716A1 (de) 2000-05-03
CN1155812C (zh) 2004-06-30
JP2000131312A (ja) 2000-05-12
JP3527152B2 (ja) 2004-05-17
RU2201969C2 (ru) 2003-04-10
CN1252525A (zh) 2000-05-10
TR199902675A2 (xx) 2000-07-21
PL336138A1 (en) 2000-05-08

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